Witnesses told NBC New York that at least four shark fins were spotted near the beach and NYPD aviation and harbor units patrolled the area after the sighting.

Jon Dohlin, Vice President and Director of the New York Aquarium, told DNAinfo the fins probable belonged harmless basking sharks feeding on small fish, but said it was a good idea for swimmers to leave the water as a precaution.

No word on whether the presence of dorsal fins off Coney Island might be a response to the shark fishing competition last month in Sheepshead Bay. Perhaps the beach visit was intended as warning for Brooklynites to leave the sharks alone?